Use the key concepts and qualifying terms identified by a topic analysis as a guide to brainstorm alternative keywords, synonyms and related terms. Synonyms and related terms allow more flexibility and breadth when searching.
Below is an example of some keywords and synonyms from the example topic:
|Keyword||Synonym / Related term|
|computer||laptop, tablet, device, information technology|
|21st century||twenty first century, millennial, modern, contemporary|
|education||teaching, school, learning, training|
Write down the key concepts from your topic and have a go at brainstorming as many alternative keywords and phrases as possible.
Thinking about your topic in this way forces you to describe your topic in "other words", which will provide you with some useful keyword alternatives as well as help you to cement your understanding of the topic.
Dictionaries and encyclopaedias can help you to find additional keywords and get an overview of the concept.
Oxford Reference Online is a huge repository of subject-specific dictionaries, encyclopaedias, and other reference-type material.